The Duro-Last Single-Ply Roof Membrane

The Duro-Last vinyl roof membrane is a proprietary thermoplastic formulation consisting of PVC resins, plasticizers, stabilizers, biocides, flame retardants and U.V. absorbents. A weft-insertion knitted scrim that is laminated between two layers of PVC film gives the membrane its strength and durability. The Duro-Last single-ply membrane is available in white, gray, dark gray, tan, or terra cotta.

Our flexible roof membrane is easily prefabricated into deck sheets up to 2,500 square feet in size, as well as custom-made parapet, stack, and curb flashings that eliminate most labor from critical roof areas transitions and changes of plane. Prefabrication provides architects, specifiers, consultants, contractors, and building owners peace-of-mind regarding the watertight security of the roof installation. Learn more about the advantages of prefabrication.

Duro-Last has met or exceeded all major fire and wind code requirements, and regional approvals as necessary throughout the country. These certifications reinforce Duro-Last's leadership in providing the consistent, watertight integrity that building owners expect.

Duro-Last has been approved by Factory Mutual as a 1-60,1-75, 1-90, 1-95, 1-105, 1-135, 1-150, 1-165, 1-195, 1-210, 1-270, 1-435, and 1-495 roofing system. Duro-Last is also listed by Underwriters Laboratories as a Class A, B, & C approved material. Evaluation services ICBO and NES have merged to form ICC-ES, which has evaluated Duro-Last for the International Building Code (IBC). The Duro-Last roofing system has been approved by the IBC and by code agency MIAMI-DADE for use in their respective jurisdictions.

Duro-Last is proud to be a charter partner of the ENERGY STAR Roof Products Program. The ENERGY STAR label indicates to building owners and managers that the Duro-Last white vinyl roof membrane can save them money on cooling costs due to its high reflectivity (reflects 88% of the sun's energy). Duro-Last is also a charter member of the Cool Roof Rating Council (CRRC) and a member of the United States Green Building Council (USGBC). Duro-Last participates in all major technical committees in the roofing industry, plus the American Society of Testing Materials (ASTM).

Duro-Shield: The Non-Metal
Metal Retrofit Roofing System

Are rusted roof decks and leaky seams starting to compromise your building's watertight integrity?

The Duro-Shield metal retrofit roofing system is a cost-effective, single-ply roofing solution that can be installed directly over existing metal roofs. The Duro-Shield system is leak-proof, virtually maintenance-free, and backed by a comprehensive 15-year full warranty or a 20-year prorated warranty. The Duro-Shield roofing system is the long-term way to protect your building against rain, temperature changes, interior drips, ice build-up, and rust and corrosion.

If time has caught up with your metal roof, it's time you consider the Duro-Shield roofing system. Contact us today to find out how a Duro-Shield metal retrofit roofing system can help you lock out leaks and lock in your investment.

Duro-Shield Metal Retrofit Roofing System

There are good reasons to choose metal roofing, including lower initial installation costs and superior protection against fire.

But time catches up with everything, including metal roofs. Years of exposure to the elements, hot and cold extremes, and rust and corrosion can combine to compromise your metal roof's integrity. In fact, if your metal roof is more than a few years old, you probably know the frustration of leaky buildings and escalating maintenance costs. And you're not alone. With over 60 billion square feet of metal roofing in place in the United States and two billion more installed each year, that adds up to a lot of leaks - and a lot of money spent fighting them.

A closer look at metal roof problems
Unfortunately, metal roofs are susceptible to a number of problems that lead to leaks and larger repair and maintenance budgets.

These are some of the most common:

Loose seams and cracked penetrations
Roofs expand and contract with the weather. Because metal roofs are made of rigid sheets fastened together, this expanding and contracting loosens screws, pulls at seams, and causes cracks to form around stacks and other penetrations.

Rust and corrosion
Everyone knows what moisture does to steel. Snow, rainfall, and ponding water eventually cause rust and corrosion to form and holes to appear.

Interior Drips
Cold temperatures chill inadequately insulated metal, causing warmer moisture vapor on the building to collect as water or frost on the underside of steel roofing panels. This condensation effect can cause dripping inside, even when the weather is dry outside. And the problem is compounded when oxidation occurs and rust forms on the inside of the building.

Ice build-up
Ice build-up in gutters can block water from properly draining off the roof during a thaw, creating a drainage back-up and providing more opportunities for moisture to enter through a roof's seams.

Duro-Shield Metal Retrofit Roofing System

There are several solutions to the problems caused by aging metal roofs, each with advantages and disadvantages.

Sealing and coating
The first and least expensive option is to re-seal exposed seams and apply a waterproof coating. But this method only protects against rain and only temporarily. That's because the roof continues to expand and contract, eventually rupturing the new seals and the coating.

Spray-on foam and sealant
The second option is to insulate the metal roof with a spray-on urethane foam and then apply a sealant.

This method helps protect against rain as well as interior drips. But the irregular surfaces of foam coatings are notorious for collecting water. That's one reason that most warranties for spray-on foam do not cover damages due to ponding water.

Roof replacement
The third option is to completely replace the roof with new insulation and new steel. This option addresses all the problems-until they begin again, since a new metal roof will have the same characteristics as the old roof. This option is also costly, involves the use of heavy equipment, and is disruptive to a building's normal operations, often exposing the building contents to the elements while work is performed.

Are there any other options?
Wouldn't it be great if, instead of fixing or replacing your metal roof, you could install a new, long-lasting roof system right over your current roof without an expensive tear-off?

Good news. You can with the Duro-Shield metal retrofit roofing system from Duro-Last.

The Duro-Shield roofing system is the cost-effective, long-term way to protect your building against rain, temperature changes, interior drips, ice build-up, as well as rust and corrosion-guaranteed.

Rock Ply

The look of roofing ballast with the watertight integrity of single-ply.

Benefits of the Rock-Ply roofing system:

Provides a ballast look combined with the watertight performance of Duro-Last's proven, thermoplastic, single-ply system.

Ideal for roofing applications where building appearance is important but conventional ballast is not practical.

Made from the same durable membrane as the regular Duro-Last roofing system.

Rock pattern is printed onto the membrane, then a special polymer coating is applied to help protect the finish from marring, fading, and dirt accumulation.

System is precision-fabricated in a Duro-Last manufacturing facility and delivered to the job site ready to be unrolled, positioned, and installed by an authorized Duro-Last contractor.

. All fasteners, flashings, and edge details come with the system.

The Rock-Ply roofing system is covered by Duro-Last's industry-leading, comprehensive warranties.

Shingle Ply

The perfect combination of watertight integrity and aesthetics.

Benefits of the Shingle-Ply roofing system:

Provides a shingle look and the watertight performance of Duro-Last's proven, thermoplastic single-ply system.

Ideal for commercial applications where building appearance is important but conventional shingles are not practical.

Made from the same durable membrane as the regular Duro-Last roofing system.

Shingle design is printed onto the membrane, and then a special polymer coating is applied to help protect the finish from marring, fading, and dirt accumulation.

Available in Slate Gray or Sandstone (50-mil only).

System is delivered to the job site ready to be unrolled, positioned, and installed by an authorized Duro-Last contractor.

All fasteners, flashings, and edge details come with the system.

The Shingle-Ply roofing system is covered by Duro-Last's industry-leading, comprehensive warranties.

The Look Of Architectural Standing Seam With the Watertight Integrity Of Single-Ply

The Vinyl Rib system consists of the Duro-Last single-ply membrane and separate vinyl ribs that are heat-welded to the installed membrane to ensure a permanent, secure installation.

Benefits of the Vinyl Rib System:

Delivers an aesthetic, architectural standing-seam look with the performance of Duro-Last's proven, thermoplastic, single-ply system

Provides a waterproofing, not just water-shedding, solution

Custom-fabricated flashings for stacks and other penetrations are heat-welded to the deck membrane to provide a monolithic, watertight roofing system

Offers more effective insulation options than traditional standing seam

Ideal performance in snow areas, preventing water back-up situations

Protected by the best warranties in the roofing industry

The Vinyl Rib system is available in light gray and white, and uses Duro-Last's 60-mil membrane, fully-adhered to the roof deck (no mechanical fasteners) to provide a smooth roof surface.